Recent scientific advances have shown the important role of immune system against cancer. Today, many immunological biotherapy like anti-PD1/PDL-1 are available in cancer treatment and generate durable clinical responses in some patients. The development of tools for monitoring anti-tumor immune responses dynamically is a major challenge to predict the effectiveness of immunotherapies anti-PD-1 and anti-PDL-1.

Thus, the objective of our study is to analyse the interest of the monitoring of anti-telomerase T helper 1 (TH1) responses in predicting the efficacy of immunotherapy, using an immunoassay developed by our group.

Inclusion Criteria:

• Patient with metastatic or locally advanced cancer candidate to anti-PD1/PDL1 immunotherapy
• Performance status 0, 1 or 2 on the ECOG scale
• Written informed consent

Exclusion Criteria:

• Patients under chronic treatment with systemic corticoids or other immunosuppressive drugs (prednisone or prednisolone ≤ 10 mg/day is allowed)
• Prior history of other malignancy except for: basal cell carcinoma of the skin, cervical intra-epithelial neoplasia and other cancer curatively treated with no evidence of disease for at least 5 years
• Active autoimmune diseases, HIV, hepatitis C or B virus
• Patients with any medical or psychiatric condition or disease,
• Patients under guardianship, curatorship or under the protection of justice.